//
//  UserAccount.swift
//  MyWeibo
//
//  Created by cat on 15/7/31.
//  Copyright © 2015年 cat. All rights reserved.
//

import UIKit

class UserAccount: NSObject, NSCoding {
    /// 用户是否登录
    class var userLogon: Bool {
        return sharedAccount != nil
    }
    /// 调用token
    var access_token: String?
    /// token的生命周期
    var expires_in: NSTimeInterval = 0 {
        didSet {
           expiresDate = NSDate(timeIntervalSinceNow: expires_in)
        }
    }
    /// 过期日期
    var expiresDate: NSDate?
    /// 当前授权用户的UID
    var uid: String?
    /// 好友显示名称
    var name: String?
    /// 用户头像地址 大图
    var avatar_large: String?
    
    init(dict: [String: AnyObject]) {
        super.init()
        
        setValuesForKeysWithDictionary(dict)
        // 设置全局的用户信息
        UserAccount.userAccount = self
        
        print(access_token)
    }
    
    override func setValue(value: AnyObject?, forUndefinedKey key: String) {}
    
    /// 对象描述信息
    override var description: String {
        let properties = ["access_token", "expires_in", "uid", "expiresDate", "name", "avatar_large"]
    
        return "\(dictionaryWithValuesForKeys(properties))"
    }
    
    // MARK: - 加载用户信息
    /// 加载用户信息 － 调用方法，异步获取用户附加信息，保存当前用户信息
    func loadUserInfo(finished: (error: NSError?) ->()) {
        NetworkTools.sharedTools.loadUserInfo(uid!) { (result, error) -> () in
            if error != nil {
                // 提示error一定要传
                finished(error: error)
                return
            }
            
            // 设置用户信息
            self.name = result!["name"] as? String
            self.avatar_large = result!["avatar_large"] as? String
            
            // 保存用户信息
            self.saveAccount()
            finished(error: nil)
        }
    }
    
    // MARK: - 归档&解档的方法
    static private let accountPath = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true).last!.stringByAppendingPathComponent("account.plist")
     /// 保存用户账号
    func saveAccount() {
        NSKeyedArchiver.archiveRootObject(self, toFile: UserAccount.accountPath)
    }
    
    
    /// 静态账户是否存在
    private static var userAccount: UserAccount?
    class var sharedAccount: UserAccount? {
        // 1.判断账户是否存在
        if userAccount == nil {
            // 解档
            userAccount = NSKeyedUnarchiver.unarchiveObjectWithFile(accountPath) as? UserAccount
        }
        // 2.判断日期
        if let date = userAccount?.expiresDate where date.compare(NSDate()) == NSComparisonResult.OrderedAscending {
            // 如果已经过期, 需要清空账号记录
            userAccount = nil
        }
        return userAccount
    }
    
    // MARK: - NSCoding
    /// 归档
    func encodeWithCoder(aCoder: NSCoder) {
        aCoder.encodeObject(access_token, forKey: "access_token")
        aCoder.encodeDouble(expires_in, forKey: "expires_in")
        aCoder.encodeObject(expiresDate, forKey: "expiresDate")
        aCoder.encodeObject(uid, forKey: "uid")
        aCoder.encodeObject(name, forKey: "name")
        aCoder.encodeObject(avatar_large, forKey: "avatar_large")
    }
    
    /// 解档
    required init?(coder aDecoder: NSCoder) {
        access_token = aDecoder.decodeObjectForKey("access_token") as? String
        expires_in = aDecoder.decodeDoubleForKey("expires_in")
        expiresDate = aDecoder.decodeObjectForKey("expiresDate") as? NSDate
        uid = aDecoder.decodeObjectForKey("uid") as? String
        name = aDecoder.decodeObjectForKey("name") as? String
        avatar_large = aDecoder.decodeObjectForKey("avatar_large") as? String
    }
}
